I don't have anything too detailed in terms of an answer, but I have heard that Hawkeye/Ronin is hunting them down, and that's what he's just killed in the trailer when Black Widow apparently locates him in Japan. Not definitive enough to provide an answer to the question though...
– DaveApr 7 at 22:56

@Dave but what could be the reason for Barton to hunt/kill them?
– VishwaApr 8 at 10:10

@Vishwa Anger as his family all dusted in front of him? That's pure Endgame speculation though, albeit based on the trailers released showing happy Clint with his family. I expect he'd quite happily just hunt down anyone/thing he could determine was involved.
– DaveApr 8 at 17:09

2 Answers
2

Yes, some of them were dusted. Half of the entire universe was dusted away (no exceptions). They weren't important enough to dust away "on-screen". Also, Thanos wouldn't need an army anymore since he had already achieved his goal.

My guess would be that Thanos even killed half of the population of the Outriders' planet when Thanos went there to get his army.

They weren't important enough to dust away "on-screen", how can you tell they were not important? They played a huge part at the battle in Wakanda
– VishwaApr 9 at 5:20

4

@Vishwa the outriders are literally mindless monsters that killed themselves without hesitation to attack the wakandans, they are literally cannon fodder and not worth dusting screen time compared to any other character we know, why waste dusting screen time on monsters we don’t care about individually or even en mass?
– morboApr 9 at 14:31

@morbo by that theory, wakandans (except main characters) would be the same, but we saw them right? anyway, I'm not sure about mindless, but they were determined to do whatever the task they were assigned to do. monsters we don’t care people do care, that's why this question is here. thanks anyway for the reply
– VishwaApr 10 at 4:38

At first, the heroes are being overwhelmed as they are too many
Outriders to fight back. Fortunately, Thor arrives to the rescue,
bringing in two Guardians of the Galaxy (Rocket Raccoon and Groot) and
a new powerful weapon called Stormbreaker, allowing the heroes to
finally defeat the Outriders and kill them all as well as the Black
Order, allowing enough time for the Scarlet Witch to destroy the Mind
Stone.